Storm Caroline is also set to bring disruption today (Thursday) and Friday, with strong winds and heavy rain and some snow showers leading up to Sunday.
It is valid until 6pm Friday, December 8.
Public transport could also be at risk of being cancelled. Frost may linger in places and temperatures at best will range 1 to 3 degrees.
A Met Eireann forecaster revealed: "Southerly winds of 50 to 65 km/h are expected with gusts of 90 to 110km/h along coastal areas on Wednesday".
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Meanwhile, a Status Yellow wind warning remains in place until for Donegal, Galway, Leitrim, Mayo, Sligo, Clare and Kerry unitil Thursday, December 7 8pm.
Saturday is expected to be a mostly dry but very cold day with varying cloud and sunny spells.
Temperatures will drop to zero or below zero tonight for the bulk of the country, he said, but will hit as low at minus 3C in the northwest tomorrow. It will turn increasingly wintry with biting north-west winds.
Road conditions will be in a poor state across the country and motorists are advised to be vigilant for ice and to slow down.
It is one of three weather warnings now in place around the country. Northwest winds will stay strong and gusty.